Of course you can. It's the moment that desire to harm turns into intent to harm that it becomes actionable.
Though "polite discourse" in this case might be considered a crowd of demontrators boooing whomever is expressing their wishes to do harm until they get a headache :D
You can. It's just tacit announcement that you're a wishy washy enlightened centrist who couldn't even be bothered to keep up with current events. Caring about things is lame right?